.box{
    color:plum;
}
span{
    display: inline-block;
    width:20px;
    height: 20px;
    border:1px solid #ccc;
}
.edit{
    display: none;
}
.view{
    display: block;
}
.editing .view{
    display: none;
}
.editing .edit{
    display: block;
}
.button{
    background: yellow;
}